Bayhydrol VP LS 2239 Polyurethane Bayer MaterialScience Polyurethane (PU) - Polyurethane dispersions (PUDs) Coatings >> Waterborne Other industry >> Glass Coating water Water-thinnable hydroxyl-bearing polyurethane dispersion. It is used as the co-reactant for aqueous polyisocyanates in the formulation of water-thinnable one-component polyurethane coatings. Used in glass coatings. Water-thinnable hydroxyl-bearing polyurethane dispersion. Used in glass coatings.